for Japanese


19 June, 2015

NRA Confirms Additional Effective Dose Reduction at Fukushima Daiichi Boundaries

At its regular meeting on June 17, Japan's Nuclear Regulation Authority (NRA) confirmed that the additional effective doses from radioactive waste had been reduced to less than 2mSv/year at the boundaries of the Fukushima Daiichi Nuclear Power Station.

In accordance with an implementation plan that the Tokyo Electric Power Co. (TEPCO) had submitted to the NRA on June 8, the company evaluated additional effective doses stemming from radioactive waste in light of the treatment of contaminated water as of the end of March 2015, and found it to be 1.44mSv/year at maximum.

The NRA secretariat then measured the concentration of radioactive materials by sampling contaminated water from various groups of tanks. Doing so, it confirmed the amounts of contaminated water stored, then carried out further analysis. As a result, it concluded that the evaluation by TEPCO was appropriate.

According to the revised medium-and-long-term roadmap for decommissioning for Fukushima Daiichi’s Units 1-4, released on June 12, water that has already been treated will undergo additional treatment by multi-nuclide removal equipment to reduce the additional effective dose to less than 1mSv/year at the boundaries of station by the end of FY15 (i.e., by March 31, 2016). (For further details, see the article entitled “Government Revises Roadmap for Medium-term and Long-term Decommissioning of Fukushima Daiichi.”)


This site uses Akismet to reduce spam. Learn how your comment data is processed.

SNS facebooktwitter

NPPs Map


“The current situation at Fukushima Daiichi NPS” -From 3.11 toward the future- (ver, July 2019)

8 July, 2019
“The current situation at Fukushima Daiichi NPS” -From 3.11 toward the future- (ver, July 2019)09:17

Recent News

21 November, 2019
TEPCO Announces Timeline for Storage and Disposal of Treated Contaminated Water at Fukushima Daiichi
15 November, 2019
JAEA Holds Public Meeting, Discusses Future Vision, Fukushima Reconstruction and Revitalization
15 November, 2019
IAEA/RCA Symposium: Cooperating with Developing Countries Through Nuclear Science and Technology
8 November, 2019
EU to Ease Restrictions on Japanese Food Imports, Though Chief Cabinet Secretary Suga Asserts Japan Will Work Toward Their Full Elimination
28 October, 2019
OCCTO’s Electricity Supply and Outlook for Winter Sees Capacity Reserve Margin of 3 Percent Nationwide
23 October, 2019
Symposium with Students Held in Tsuruga City on Future Research and Test Reactors
17 October, 2019
JAIF Holds Women’s Symposium, with Presentations by Weathercaster and Professor
7 October, 2019
Fukushima Joban Products Fair Begins, Featuring Seafood Sent Directly to Restaurants in Tokyo-Yokohama Area
3 October, 2019
Kindai University, Hayakawa Rubber Develop Easily-molded Radiation Shielding Material
30 September, 2019
MEXT Minister Shares His Hopes with the Press, Seeking to Secure Human Resources Together with Universities